When you need a High Quality Opening
Oval Type LKDAccess Tank Cover -
Upper. LKD 320 x 440 with hinge and LKD 510 x 410 manhole cover. Lower. LKD 450 x 350 with angle-shaped frame and flat frame.

Application

The oval Access Tank Cover LKD manhole covers are used on tanks or containers where a closeable means of access to the interior of the vessel is required.
The particular cover has been designed taking into account today’s demands for manhole covers which are suitable for CIP cleaning processes and where access to the tank is only necessary for occasional inspection

Working principle

Open the cover by loosening the handle. For inspection purposes the cover can then be turned into the tank. If it is necessary to physically enter the tank, the cover can be removed at the double hinge or swung out of the tank, depending on the model. The seal is hygienically positioned and is not affected by positive or negative pressure in the tank.

Materials

Type LKD320x440 LKD 510x410 LKD 450x350
Steel parts 1.4301( 304) or
1.4404 (316L)
Cover and frame are supplied
with inspection certificat 3.1.B according EN10204		 1.4301 (304) or
1.4404 (316L)
Cover and casing are
supplied with inspection
certificate 3.1.B according
EN10204		 Cover and frame:
1.4301 (304) or
1.4571 (316Ti)
supplied with inspection
certificate 3.1.B according
EN10204.
Other steel parts:
1.4301 (304)
 
 
 
 
Plastic parts Nylon Nylon  
Seal Nitrile (NBR) in a quality
approved by the food
industry		 Nitrile (NBR) in a quality
approved by the food
industry		 Nitrile (NBR)
 
 
 
Finish Semi bright. Semi-bright Semi-bright

Technical data

Type LKD 320x440 LKD 510x410* LKD 450x350 LKD-P PED approved
Max. static pressure 150 kPa (1.5 bar) 250 kPa (2.5 bar) 200 kPa (2 bar) 300 kPa (3 bar)
Max. positive working pressure 0 kPa (0 bar) 0 kPa (0 bar) 0 kPa (0 bar) up to 500 kPa (5 bar)
Max. negative working pressure 50 kPa (0.5 bar) 50 kPa (0.5 bar) 50 kPa (0.5 bar) 50 kPa (0.5 bar)
Test pressure 225 kPa (2.25 bar) 375 kPa (3.75 bar) 300 kPa (3 bar) 1.3xmax. working pressure
Test temperature     20°C 20°C
Temperature range -20°C to +90°C (NBR) -20°C to +90°C (NBR) -20°C to +100°C -20°C to +100°C
* The above values apply for non-pressure manhole cover, type LKD and LKDI.
Installation LKD 320x440 Installation of LKD 510x410
Welding of manhole cover LKD 320x440 into insulated tank.
 
Installation LKD 510x410

In order to obtain a perfect seal and a good function of our manhole covers, it is essential that the welding of the casing is carried out carefully and correctly. If the cover is fitted on a vertical tank wall, the hinge of the casing must always be placed on the lefthand side. For thin-gauged containers, ie. sheet thickness less than 2.5 mm, welding is easier if the hole is marked in such a way that a 10 mm edge can be burred up as sharply as possible.
When the hole is cut and the edge burred up, if applicable, the casing is inserted, and tack-welding is now carried on at points placed opposite each other all the way round, in the sequence shown in fig. 4.
The casing may now be fully welded on both sides. A control should be made by removing the rubber seal, and cover and casing should be assembled loosely to ensure that they fully contact each other over the whole surface.
Any stresses are removed by hammering the sheet around the casing.

Installation LKD 450x350

1. Remove seal form cover.
2. Fit cover with hinge in frame.
Please note the dimensions shown.
PED approved version, LKD-P
3. Weld hinge to frame.
Left-hand hinge to the left and right-hand hinge to the right.
Frame thickness (mm) Cover (mm) Max. working pressure (bar)
at max. working temperature
100°C 		Max. negative working pressure (bar)
 
 
3 3 3 bar 0.5
** 4 4 4 bar 0.5
10 3 3 bar 0.5
**10 4 5 bar 0.5
** On request

Option LKD 320x440

  • - Seal of EPDM rubber.

Ordering

Please state the following:
- Cover type.
- Steel part material: 1.4301 (304) or 1.4404 (316L).
- Seal ring material type: Nitrile or EPDM.
- Frame height

Dimensions (mm)

Type LKD 320x440 LKD 510x410 LKDI 510x410 LKTD 510x410 LKTDI 510x410 LKD flat 450x350 LKD angled 450x350
A 460 534 534 534 534 446 446
B 340 434 434 434 434 346 346
C   665 665 665 665 506 517
D           406 417
E   230 260 230 260 160 220
E             250
E             290
F 48 56 98 56 98   70
F             100
F             140
t 10 12 12 12 12 10 3-4
Sheet thickness of cover   2.5 2.5 10 10 3-4 3-4
Weight (kg) 8 19 24 31 34    

Weights (kg) LKD 450x350

Angle shaped frame 70/3 3.5
Angle shaped frame 70/4 4.6
Angle shaped frame 100/3 3.8
Angle shaped frame 100/4 5.1
Angle shaped frame 140/3 6.0
Angle shaped frame 140/4 8.0
Flat frame 10 x 30 3.0
Cover 3 3.0
Cover 4 4.0
Handle + clamp arm   2.4
Hinge   1.8 LKD 320x440
         
  LKD 450x350 angleshaped frame
         
LKD 510x410 LKD 450x350 flat frame